Assembling the Y-axis

You need the part below for assembling the Y-axis

  • 2x smooth rod 410mm, 8 mm diameter
  • 2x M10 threaded rod, 440 mm
  • 4x M10 threaded rod, 210 mm
  • 3D printed Y corners
  • 3D printed Y axis motor holder 
  • 3D printed axis idler printed part 
  • 12x M10 nut
  • 12x M10 washer
  • 22x M8 nut
  • 22x M8 washer
  • 2x M3x10 bolt
  • 2x F624 bearing
  • 1x M4x30 bolt
  • 1x M4x20 bolt
  • 3x M4 nut
  • 1x M4 washer

 

Mounting the Y-Axis carriage and parts

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Take a stepper motor, the Y axis motor holder printed part and two M3x10 bolts. Mount it to the motor as shown. Set aside for later.

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Mount the two bearings with the M4 bolt and 2 M4 nuts on the idler. Take care not to over-tighten the bolt; the two bearings have to rotate freely.

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The M4 nut almost never fits in the trap. Don’t force it in, you might damage the printed part. Instead use a soldering iron to heat the nut, and gently push the nut into the trap.

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Side view of the idler.

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The belt tension-er mounted in the Y-frame Mounting the Y-frame is pretty straightforward. Take care you place the axis and the bearings of the idler exactly in the middle of the frame.

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For both the X-Axis and the Y-Axis you need approximately xx cm (yy inch) of timing belt. I used 2.0 mm pitch timing belt (GT2) and two GT2 pulleys with 20 teeth. You will need this data when calibrating the printer.

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Slide the pulley onto the motor shaft as shown and tighten it with two M3x4 grub screws. Leave a bit of space between the motor body and the pulley.

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To complete the next step, your Heated Bed should be ready and mounted on the plywood (see chapter 6). Flip over the Y-Axis and use wood screws to attach Y-belt clamp to the plywood. Pass the belt over the motor and belt tensioner and put together both ends of the belt and fasten them with tie-wraps. Use the idler to set the tension of the belt.

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Installing the Y-Axis carriage on the wooden frame

If your frame is finished, you can install the Y-Axis carriage on the boxed frame. If you have used 12mm plywood (like I did), you will notice that you need to fill up a gap between the 10mm threaded rods. I used two pieces op plywood of 7 mm thick.

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One other problem I ran into was the Y-Axis stepper motor. Its base collided with the boxed frame and I had to carve out a couple of mm plywood to fix this.

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Now proceed to chapter 3: The X-Axis